One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,8)(5,6)(9,13)(10,15)(11,16)(12,14)(17,18)(19,20)(21,24)(22,30)(23,25)(26,31)(27,32)(28,29)(33,34)(35,37)(36,44)(38,46)(39,40)(41,48)(42,43)(45,47) involution — undirected(2,6)(3,9)(8,14)(10,11)(17,19,23,21)(18,24,25,20)(22,27,31,29)(26,32,30,28)(33,35)(34,37)(36,45)(38,43)(39,41)(40,48)(42,46)(44,47)(18,25)(20,24)(26,30)(28,32)(34,40)(35,41)(36,46)(43,47) involution — undirected(1,2)(3,7)(4,8)(5,6)(9,13)(10,15)(11,16)(12,14)(17,20,23,24)(18,19,25,21)(22,28,31,32)(26,27,30,29)(33,36)(34,38)(35,42)(37,47)(39,46)(40,44)(41,45)(43,48)(1,3,5,9)(2,7,6,13)(4,11,12,10)(8,16,14,15)(17,21,23,19)(18,24,25,20)(22,27,31,29)(26,28,30,32)(33,37)(34,35)(36,47)(38,42)(39,48)(40,41)(43,46)(44,45)(1,4,5,12)(2,8,6,14)(3,10,9,11)(7,15,13,16)(17,22,23,31)(18,26,25,30)(19,27,21,29)(20,28,24,32)(33,38)(34,36)(35,43)(37,45)(39,44)(40,46)(41,47)(42,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.